Resumen de Triassic-Jurassic Lacustrine Deposition in the Fundy Rift Basin, Eastern Canada
The Fundy rift basin, comprising the contiguous Minas, Fundy, and Chignecto structural subbasins (Figure 1), is filled by terrestrial redbed siliciclastics, minor carbonates, and tho leiitic basalts of the Fundy Group, Newark Super group. The Minas subbasinis a shallow transtensional basin formed by left-oblique slip (Olsen and Schlische, 1990) on there activated Minas fault zone, a transform along which the Meguma and Avalon terranes were superimposed during the late Paleozoic. Outcrops of Fundy Group strata occur almost exclusively asseacliffs along the shores of the Bay of Fundy. In the Minas subbasin, a maximum of approximately 1 km of Fundy Group section is exposed along the northern and southern shores of the geographic Minas Basin and the eastern side of the Blomidon Peninsula(Figure 1).
The Fundy and Chignec to subbasins are simplehalf-grabens formed when regional extension caused reactivation of Paleozoic thrusts as southeast dipping normal faults with displacement locally exceeding 10 km (With jack et al., 1995).Fundy Group strata are exposed along the Nova Scotia shore of the Bay of Fundy, forming the Fundy subbasin margin. A rider block along the faulted northwestern margin of the Fundy sub basinat Point Lepreau in New Brunswick exposes nearly2.5 km of strata. Over 3.5 km of Mesozoic strata were penetrated in the Chinampas N-37 well (Figure1) drilled offshore in the Fundy subbasin, and interpretation of seismic data suggests that thethickness of the Mesozoic section may exceed 8k min the Fundy subbasin depocenter (Brown and Grantham, 1992; Wade et al., 1996). The Chignectosubbasin is bounded to
